Commercial & Industrial Concrete

Machine Foundations
in Houston, TX

Reinforced concrete bases for compressors, presses, pumps and mills across the Houston Ship Channel and Grand Parkway plants. Formed, drilled, poured and grouted by our own crews and tuned to the machine.

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Worker checking an anchor-bolt template over the rebar mat of an equipment pad at a Houston plant

23Years Pouring Concrete

640Foundations Poured

1.2MSq. Ft. of Flatwork

98%Repeat & Referral

Service Overview

Machine Foundations Built to Hold Their Line

Heavy rotating and reciprocating machines fail at the base long before they fail at the motor. A base that is too light lets the machine move. So does Houston's expansive clay, which swells and shrinks with the weather. Under a compressor, forging press or slurry pump, that movement backs the anchor bolts out, cracks the grout, and spreads vibration into every line and skid bolted nearby.

A machine foundation fixes that for good: a mass of reinforced concrete sized to the dynamic load and tuned so it does not resonate with the machine. Jimenes Construction pours these bases with our own crews, 23 years of them, and engineers each one for Houston clay, from the anchor-bolt template to the final grout.

A machine foundation does a different job than a static equipment pad. The pad carries a load that just sits there, while the block has to hold a machine that shakes, spins or pounds while it runs. We keep every step in house, from the layout crew to the grout crew. We set the anchor-bolt template, drill, pour and grout, and hand the millwright a base that sits flat and stays put.

On high-plasticity clay or under a heavy dynamic load, we carry the block on drilled piers below the active zone, the same way we build a structural concrete foundation. The soil report and the machine data sheet decide the design. We price it line by line, so you can see the block, the piers and the isolation on paper.

Machine Bases at a Glance

Self-performed crews on every pour
Sized to the dynamic load on the OEM sheet
Tuned off the machine's operating speed
Anchor-bolt templates to tight tolerance
Non-shrink and epoxy grout under baseplates
Drilled piers below the active zone

Coverage

Machine Foundation Types We Pour

Each machine loads its base a different way. We crew, form and pour all six in house.

Block Foundations for Reciprocating Machines

Massive reinforced blocks for compressors, forging presses and diesel engines, sized so the concrete mass damps the unbalanced forces those machines throw.

Pier-Supported Machine Blocks

Blocks carried on drilled piers below the 8 to 20 foot active zone, for high-plasticity clay and soft ground near the Ship Channel and Baytown.

Vibration-Isolated Inertia Bases

Inertia blocks on spring isolators or elastomeric pads, so the machine's shaking stays in the base and out of the building and the next skid over.

Rotating Equipment Bases

Tuned bases for centrifugal pumps, blowers, fans, motors and small turbines, kept clear of the operating speed so the base does not resonate.

Table-Top & Framed Foundations

Elevated framed foundations with columns and a top deck for large turbines and generators, where the machine has to sit above pipe and access room.

Grouted Baseplates & Anchor Systems

Anchor-bolt templates, sleeves and embeds set to tight tolerance, then non-shrink or epoxy grout under the sole plate so the machine seats without a shim stack.

Our Process

Our Machine Foundation Process

Five steps, the same on a single pump base and on a compressor block. Call (832) 576-3278 to start at step one.

01
Machine Data & Soil Report
We pull the machine's weight, speed, unbalanced forces and anchor-bolt drawing from the OEM sheet. Then we read the geotech report, PVR and active zone before we price anything.
02
Dynamic Design & Estimate
The engineer sizes the block or pier group and checks the base's natural frequency against the operating speed. You get a line-item quote: mass, steel, piers, isolation and grout.
03
Permit, Piers & Anchor Template
Permit pulled with Houston or Harris County, then piers drilled below the active zone. The anchor-bolt template and embeds go in next, set and surveyed to tolerance, then braced.
04
Steel, Pour & Cure
Rebar mat tied and chaired, then one mass-concrete placement, vibrated tight around the embeds. On big blocks we control the heat so the core does not crack the pour.
05
Grout, Set & Sign-Off
Baseplate leveled and grouted with non-shrink or epoxy grout, machine set and bolts torqued, then engineer letters and the anchor survey filed at closeout.

Timeline

How Long Does a Machine Foundation Take?

Real ranges from our own job records, from mobilization to grout and sign-off.

Foundation Type	Typical Machine	Duration
Rotating equipment base	Pump, blower or motor skid	1 - 2 Weeks
Reciprocating compressor block	Gas or air compressor	2 - 4 Weeks
Press or mill foundation	Forging press, roll mill	3 - 6 Weeks
Pier-supported machine block	Heavy machine on clay	4 - 7 Weeks
Table-top turbine foundation	Turbine or generator	6 - 10 Weeks

Engineering & Compliance

Materials, Methods & Code Compliance

A machine base has to hold its frequency and its anchor tolerance along with its strength. We design for all three.

Soils & Dynamics

Geotech report and PVR read before we quote
Dynamic soil modulus for the frequency check
Active zone of 8 to 20 feet sets pier depth
Isolation weighed where the ground is soft

Mass & Materials

3,000 to 4,500 psi structural mixes
High-mass, low-heat placements on big blocks
Grade 60 deformed rebar in a full mat
Non-shrink and epoxy grout under baseplates

Code & Standards

ACI 351.3R for dynamic machine foundations
2021 IBC as adopted by Houston
Anchorage designed to ACI 318 Chapter 17
Vibration held inside accepted service limits

Tolerance & Sign-Off

Anchor-bolt template survey before the pour
Embeds set to the OEM tolerance
Pre-pour steel, form and pier inspection
Sealed engineer letters filed at closeout

Why Jimenes

Why Choose
Jimenes Construction

One Crew, Template to Grout

Machine bases go wrong at the hand-offs: a steel sub, a pump crew, a grout crew. Our own crew sets the template, pours the block and grouts the plate, so nothing is lost between trades.

Tuned to the Machine

Most machine base trouble comes from resonance. We size the mass and check the natural frequency against the operating speed, so the base does not shake itself loose.

Anchor Bolts to the Drawing

We survey the anchor-bolt template before the pour and set embeds to the OEM tolerance. The millwright drops the machine on and bolts it down without a shim stack.

Line-Item Machine Pricing

The block, the piers, the isolation, the anchors and the grout each get their own line. You see what drives the cost, and change orders are signed before the work.

Credentials

Insurance, Warranty & Sign-Off

Texas does not license concrete contractors, so we send the insurance certificate and the engineer's letters with every proposal. Here is what a machine foundation contractor in Houston can actually show you.

Permitted & Inspected City of Houston and Harris County

General Liability $2M per occurrence

Workers’ Comp Full crew coverage

Warranty 10-yr structural, 1-yr workmanship

Where We Work

Our Service Area

Headquartered in Houston and pouring machine foundations across the Greater Houston industrial belt, from the Ship Channel and Pasadena out along the Grand Parkway. If you searched for a machine foundation contractor near me and landed here, this is the radius we cover. We can be on site the same week.

Do not see your town? Call us, we travel for the right project.Check Your Address

Good Questions

Frequently Asked Questions

Still not sure? Call and talk to the person who will run your machine foundation.

Talk to a Builder

(832) 576-3278

What is the difference between a machine foundation and an equipment pad?

A machine foundation carries a dynamic load: a machine that shakes, spins or pounds while it runs. It is a heavy reinforced block sized and tuned so it does not resonate with the machine, and it holds tight anchor-bolt tolerances. An equipment pad carries a static load, like a tank, a chiller or a transformer that just sits there. If your machine has moving parts and an operating speed, it needs a machine foundation.

How much does a machine foundation cost in Houston?

There is no flat rate. The dynamic design drives the price. Five things move the cost:

Machine weight, speed and unbalanced forces
Concrete mass and rebar in the block
Drilled piers, if the clay calls for them
Vibration isolation, springs or pads
Anchor-bolt templates and the grout system

We do not publish a price per square foot, because a machine base is priced by the load it carries. Send us the machine data sheet and the soil report and we will give you a free line-item estimate.

How do you keep machine vibration out of the rest of the plant?

Two ways, and the engineer picks based on the machine and the soil. First, mass: a heavier block damps the shaking on its own. Second, isolation: we set the block on spring isolators or elastomeric pads so the vibration stays in the base and out of the building and the next skid over. On soft ground near the Ship Channel we often carry the block on drilled piers so it does not ride on the clay at all.

How long does a machine foundation take to build?

A single rotating equipment base can run one to two weeks. A compressor block runs two to four. A pier-supported block or a table-top turbine foundation can run six to ten weeks, because the piers, the mass concrete and the cure all take real time. Two things stretch the schedule: the OEM anchor-bolt drawing, which we need before we set the template, and a plant shutdown window the work has to land inside. You get a dated schedule at contract.

Can you build a machine foundation on Houston clay near the Ship Channel?

Yes, and the clay is exactly why the design matters here. Much of the soil south of Interstate 10 is expansive, with plasticity index numbers in the 40s and 50s, and the active zone runs about 8 to 20 feet deep. A heavy machine block cannot ride on that ground and stay level. We carry it on drilled piers below the active zone, the same way we build a structural concrete foundation. The geotech report tells us how deep to go.

Who sets the anchor bolts, and what tolerance do you hold?

We do. We build the anchor-bolt template from the OEM drawing and set the bolts and embeds in it. We survey the template before the pour, so nothing shifts while the concrete goes in. We hold the position tolerance the machine builder calls for, which is tight. When the millwright arrives, the baseplate is grouted flat and the machine bolts down without a shim stack. Call (832) 576-3278 and send the anchor-bolt plan.